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Background: The Stemmer sign is a physical examination finding used to diagnose lymphedema. If the examiner cannot pinch the skin of the dorsum of the foot or hand then this positive finding is associated with lymphedema. The purpose of the study was to determine the accuracy of the Stemmer sign to predict lymphedema. Methods: All patients referred to our Lymphedema Program between 2016 and 2018 were tested for the Stemmer sign and underwent lymphoscintigraphy to define the patient’s lymphatic function. Patient age, lymphedema type (primary and secondary), disease location (arm and leg), lymphoscintigraphy findings, stage, severity, and body mass index were recorded. Comparison of predictive variables and Stemmer sign result was performed using Fisher’s exact test and Student’s t test. Results: One hundred ten patients were studied: patients with a positive Stemmer sign (n = 87) exhibited abnormal (n = 80) or normal (n = 7) lymphatic function by lymphoscintigraphy (sensitivity = 92%). False-positive Stemmer signs included individuals with obesity (n = 6) or spinal muscle atrophy (n = 1). Subjects with a negative Stemmer sign (n = 23) had normal (n = 13) or abnormal (n = 10) lymphatic function by imaging (specificity = 57%). Patients with a false-negative Stemmer sign were more likely to have a normal body mass index (P = 0.02) and Stage 1 disease (P = 0.01). Conclusions: A positive Stemmer sign is a sensitive predictor for primary and secondary lymphedema of the arms or legs and, thus, is a useful part of the physical examination. Because the test exhibits moderate specificity, lymphoscintigraphy should be considered for patients with a high suspicion of lymphedema that have a negative Stemmer sign.
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Lymphedema often is confused with other causes of extremity edema and enlargement. Understanding the risk factors and physical examination signs of lymphedema can enable the health care practitioner to accurately diagnose patients ∼90% of the time. Confirmatory diagnosis of the disease is made using lymphoscintigraphy. It is important to correctly diagnose patients with lymphedema so that they can be managed appropriately.
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Vascular anomalies and related conditions cause overgrowth of tissues. The purpose of this study was to determine the efficacy and safety of liposuction techniques for pediatric overgrowth diseases. Patients treated between 2007 and 2015 who had follow-up were reviewed. Seventeen patients were included; the median age was 12.7 years. The causes of overgrowth included infiltrating lipomatosis (n = 7), capillary malformation (n = 6), hemihypertrophy (n = 1), infantile hemangioma (n = 1), lipedema (n = 1), and macrocephaly-capillary malformation (n = 1). Forty-seven percent had enlargement of an extremity, 41 percent had facial hypertrophy, and 12 percent had expansion of the trunk. All subjects had a reduction in the size of the overgrown area and improved quality of life. Suction-assisted tissue removal is an effective technique for reducing the volume of the subcutaneous compartment for patients with pediatric overgrowth diseases. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.
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BACKGROUND: There are many causes for a large lower limb in the pediatric age group. These children are often mislabeled as having lymphedema, and incorrect diagnosis can lead to improper treatment. The purpose of this study was to determine the differential diagnosis in pediatric patients referred for lower extremity "lymphedema" and to clarify management. METHODS: The authors' Vascular Anomalies Center database was reviewed between 1999 and 2010 for patients referred with a diagnosis of lymphedema of the lower extremity. Records were studied to determine the correct cause for the enlarged extremity. Alternative diagnoses, sex, age of onset, and imaging studies were also analyzed. RESULTS: A referral diagnosis of lower extremity lymphedema was given to 170 children; however, the condition was confirmed in only 72.9 percent of patients. Forty-six children (27.1 percent) had another disorder: microcystic/macrocystic lymphatic malformation (19.6 percent), noneponymous combined vascular malformation (13.0 percent), capillary malformation (10.9 percent), Klippel-Trenaunay syndrome (10.9 percent), hemihypertrophy (8.7 percent), posttraumatic swelling (8.7 percent), Parkes Weber syndrome (6.5 percent), lipedema (6.5 percent), venous malformation (4.3 percent), rheumatologic disorder (4.3 percent), infantile hemangioma (2.2 percent), kaposiform hemangioendothelioma (2.2 percent), or lipofibromatosis (2.2 percent). Age of onset in children with lymphedema was older than in patients with another diagnosis (p = 0.027). CONCLUSIONS: "Lymphedema" is not a generic term. Approximately one-fourth of pediatric patients with a large lower extremity are misdiagnosed as having lymphedema; the most commonly confused causes are other types of vascular anomalies. History, physical examination, and often radiographic studies are required to differentiate lymphedema from other conditions to ensure the child is managed appropriately.
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